Doepfer A-138M

Matrix Mixer

  • With 4 rows and 4 columns
  • Unipolar / Bipolar mode switchable on each column
  • Suitable for both control voltage and audio
  • Width: 20 HP
  • Depth: 20 mm
  • Power requirements: +30 mA (+12 V) / -30 mA (-12 V)

Further Information

Modul Type Mono
Width 20 TE / HP
11 Customer Ratings:
  • 5
  • 4
  • 3
  • 2
  • 1
4.5 / 5.0
  • handling
  • features
  • quality
6 written ratings Read all reviews
Total
Did you know it can also work as a sequencer?
11.01.2016
What an essential and often overlooked module! Besides its obvious use for mixing audio and CV signals, Doepfer A-138M matrix mixer can also function as a sequencer: you can turn it into a 4 step chord sequencer (4 note chords!) or a 16 step traditional sequencer by adding a few additional modules. Feed gate outs 1-4 from either A-152 or A-161 into each respective input. Send each output to 1V/Oct inputs of your 4 VCOs. Play with a clock divider to find the right pace. Or do the same, but connect outputs into an A-151 and then into a VCO. Now you've got 16 steps! As always, very impressed with Doepfer.
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Total
The heart of my sequencing rig
25.05.2016
This unit is exceptionally useful.
As a straight forward mixer, you can mix up to four signals and route them to four separate outputs, and each output can be set independently to sum the signals in a unipolar (positive voltage only) or bi-polar (positive and negative) fashion. Leaving the first input unplugged also allows you to add an offset to each output via the top row of knobs - very useful!
Where this unit comes into its own however is as a sequencer - you can create four separate sequences from the same input voltages - which can then be used to drive four oscillators to give some nice chords, or if you add an A-151 sequential switch (recommended!) you can create much longer and more complex sequences by switching between the outputs and sending them to one oscillator.

You can also mix LFOs / envelopes etc to create interesting and evolving modulation sources.
You can even (very carefully!) feed the outputs back into the mixer and use it for 'zero-input-mixer' music (disclaimer - feedback is tricky to control! Be careful!)

The usual high Doepfer standards apply here, the perfect blend of affordability and usability.
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Show variations of this product
Doepfer A-138M
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Doepfer A-138M
to the product
138 €

Matrix Mixer With 4 rows and 4 columns, Unipolar / Bipolar mode switchable on each column, Suitable for both control voltage and audio, Width: 20 HP, Depth: 20 mm, Power requirements: +30 mA (+12...

  • Modul Type: Mono
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Width: 20 TE / HP
  • Basic System: No
  • Accessories: No
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  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
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  • Accessories: No
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  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
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  • Basic System: No
  • Accessories: No
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  • Width: 8 TE / HP
  • Module: Yes
  • Empty Rack, Or Housing: No
  • Basic System: No
  • Accessories: No
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Analog-/ Trigger Sequencer 2 Switch rows with 8 steps each, Eurorack format, Width: 50 HP, Depth: 40 mm, Power requirement: +80 mA (+ 12 V) / -20 mA (-12 V), Optional expander module: Article Nr...

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  • Module: Yes
  • Empty Rack, Or Housing: No
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  • Accessories: No
Doepfer A-138i
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Doepfer A-138i; Eurorack module; compact 4-channel mixer; works for CV and audio signals; level control and mute switch per channel; two groups of single outputs; two mix outputs; power consumption:...

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Doepfer A-110-1
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Doepfer A-110-1
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Standard VCO for Modular System A-100Module A-110-1 (VCO) is a voltage controlled oscillator. The A-110-1 produces frequencies in a range of about 8 octaves, of which four waveforms are available...

  • Analog: Yes
  • Module: Yes
  • Digital: No
  • Width: 10 TE / HP
  • Empty Rack, Or Housing: No
  • variants: Doepfer
  • Basic System: No
  • Accessories: No
138 €
Including VAT; Excluding 20 € shipping
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Available immediately

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Phone: +49-9546-9223-30
FAX: +49-9546-922328
Offers include 24% Greek VAT and are valid as long as stocks last. Shipping costs to Greece are 20 EUR, free shipping on orders above 298 EUR. Please click here for international Shipping rates. We do not accept liability for typographical errors or inaccurate information of any kind. *RRP = manufacturer's / distributor's recommended retail price in Germany
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